Critical Issue
Description
Half-rate QDR II/II designs using the Nios II sequencer at speeds below 300 MHz may experience calibration failures when targeting Stratix V devices.
This issue will be fixed in a future version of the QDR II and QDR II SRAM Controller with UniPHY.
Resolution
The workaround for this issue is to run half-rate QDR II/II designs using the Nios II sequencer targeting Stratix V devices at speeds faster than 300 MHz.